Which three statements are correct about RIP version 2?

The Company WAN is migrating from RIPvl to RIPv2. Which three statements are correct about RIP version 2? (Choose three)

A.
it has the same maximum hop count as version 1.

B.
It uses broadcasts for its routing updates.

C.
it is a classless routing protocol.

D.
It has a lower default administrative distance than RIP version 1.

E.
It supports authentication.

F.
It does not send the subnet mask in updates.

Explanation:
RIPV1
RIPV1 is a classful routing protocol, it sends update packets which does not contain subnet mask information every 30 seconds , it does not support VLSM and performs border automatic route summary by default, it can’t be shut down, so it does not support non-consecutive networks and authentication, it uses hop counts as metric, the administrative distance is 120. Each packet contains 25 routing information at most, and routing update is broadcast.

RIPV2
RIPV2 is a classless routing protocol, whose transmitted packets contain subnet mask information, it supports VLSM and enables the function of auto-summary. So, it is needed to manually shut down the function of auto-summary in order to send subnet information to the main network. RIPV2 only supports summarizing routing to the main network instead of summarizing different main networks. So it does not support CIDR. RIPV2 updates routing by use of the multicast address 224.0.0.9, only the corresponding multicast MAC address can reply to packets. Whether reply to packets and support authentication or not can be distinguished at the MAC layer.

Note: Refer to the classful routing protocol, when the subnet of the interface sending routing packets is in the same main network as the subnet associated with the packets, the router can transmit subnet information through this interface assuming that the interface and the subnet of packets use the same subnet mask.